Designing and manufacturing innovative frequency control devices since 1927
Heavy Load,
3.3V,
Tristate Oscillator with
STAND-BY FUNCTION
SM994
With an input current requirement of only 2.5✙ A typical in standby
✙
mode, Monitor Products’ miniature, surface mount SM994
oscillator is ideal in applications where low power standby
consumption is critical. This product differs from our standard 990
Tristate series in that the oscillator turns off during the disabled
function, and the output impedance goes high (our SM990, SM991,
SM992 and SM993 models continue oscillating although the output
stage is disabled and the impedance goes high).
APPLICATIONS
M
M
M
M
M
M
M
M
M
PDAs
ATM
PCMCIA
Laptops
Controller Boards
Wireless RF
Networking
Disk & Tape Drives
Cameras
SM994
FEATURES
Only 2.5✙ when using standy function
TTL/CMOS compatible
Low profile (1.6mm)
Reflow solderable at 2601 C
for 10 secs
M
Hermetically-sealed, ceramic package
M
16mm tape & reel (500 pcs/reel)
M
M
M
M
Units = mm
DEVELOPED FREQUENCIES
1.843200
2.048000
2.457600
3.000000
3.579545
3.686400
4.000000
4.096000
4.354500
4.433619
4.915200
5.000000
5.068800
6.000000
6.144000
6.250000
6.758400
7.108000
7.200000
7.372800
7.680000
8.000000
8.064000
8.192000
9.830400
10.000000
11.059200
12.000000
12.288000
12.352000
12.441600
12.500000
13.330000
13.500000
13.600000
14.318180
14.745600
15.000000
15.360000
16.000000
16.384000
16.500000
16.666000
16.666700
16.670000
17.631200
17.734476
18.432000
18.937500
19.069928
19.200000
19.312500
19.440000
19.660800
20.000000
20.160000
20.250000
20.284000
20.736000
22.000000
22.118400
22.220000
22.222200
22.500000
23.040000
23.587000
23.941100
24.000000
24.192000
24.576000
25.000000
25.175000
25.426500
25.750000
26.660000
27.000000
27.500000
28.224000
28.322000
28.375000
28.636360
29.491200
29.498900
29.498920
29.500000
30.000000
30.159000
30.720000
31.500000
32.000000
32.256000
32.768000
33.000000
33.330000
33.333000
33.333330
33.868800
34.200000
34.560000
34.574400
34.576000
48.000000
50.000000
50.113630
50.000000
52.000000
52.900000
53.000000
53.125000
53.203425
53.693175
54.000000
54.217400
55.000000
56.250000
56.448000
57.600000
60.000000
62.196000
62.500000
63.566400
64.000000
65.000000
65.536000
66.000000
66.393900
66.660000
66.666000
66.666660
66.666700
66.667000
67.500000
67.737600
71.500000
75.000000
80.000000
ELECTRICAL
SPECIFICATIONS
Frequency Range
Supply Voltage
Load Capacitance
Disabled Standby
Current
Input Current
Symmetry
Frequency Stability
Oper Temp Range
Rise and Fall Time
Start Up Time
Logic 0 Level
Logic 1 Level
Phase Jitter RMS
SM994
3.3 V Heavy Load / Tristate / Standby
1.8432 ~ 80.0 MHz*
3.3 VDC
!
0.3 V
30 pF
2.5
✙A
typical, 10
✙A
max
45 mA max (Vcc 3.3V)
50/50
!
10% std (50/50
!
5% optional**)
!
100 ppm std (! 50 ppm avail)
01C ~ 701C std (other options avail)
1.5 nS typ, 3 nS max
5 mS max
Vcc X 0.1V max
Vcc X 0.9 V min
8 ps typical
* Denotes frequency range potential. Contact factory for your specific requirement
** 5% symmetry available for selected frequencies - call factory for details
Monitor Products has a proven track record as a pioneer manufacturer in
the frequency control market. If our extensive selection of standard and
engineered crystals and oscillators does not meet your spec, we will work
with you towards a customized solution.
Monitor Products Company Inc reserves the right to make changes to its products and product specifications without notice. No liability is assumed as a result of their use or application.
08-21-01
502 VIA DEL MONTE, OCEANSIDE, CA 92054
TEL:
760.433.4510
FAX:
760.434.0255
SM994
ENVIRONMENTAL PERFORMANCE SPECIFICATIONS
Oper Temp Range
Storage Temp Range
Humidity
Hermetic Seal
Solderability
Reflow Solderability
Vibration
Shock
MIL-PRF-55310
Packaging
-101C ~ 701C standard *
-551C ~ 1251C
85% RH, 851C, 48 Hours
Leak Rate 2 x 10
-8
ATM-cm
3
/sec max
MIL-STD-202F Method 208E
2601C for 10 seconds
MIL-STD-202F Method 204,
50G, 50 to 2000 Hz
MIL-STD-202F Method 213B
Test Cond E, 1000G, 1/2 Sine Wave
Exceeds environmental and electrical
specifications of equivalent MIL-PRF-55310
16mm Tape & Reel (500pcs/reel)
or Bulk (<500pcs )
*
See Part Numbering Key for other temperature options
Terminal 3 goes to
High Impedance
Output Disabled
Open or Logic “1”
Output Enabled
(Internal 10K
W
pull-up resistor)
0.01
l
F
+ VCC
OUT
#4
#3
C
L
30 pF
#1
#2
TEST CIRCUIT
Units : mm
TAPE DIMENSIONS
REEL DIMENSIONS (500pcs/reel std)
PART
NUMBERING
KEY
Sample Part Numbers
SERIES
SYMMETRY
FREQUENCY
STABILITY
B = 100 ppm*
C = 50 ppm
TEMPERATURE
RANGE
2 = 01C ~ 701C
5 = -401C ~ 851C
6 = -551C ~ 1251C
7 = -101C ~ 701C*
PACKAGING
A = Bulk (< 500pcs)
E = Tape & Reel*
(500pcs /reel)
FREQUENCY
SM994
3.3V, 30pF
21 = 55/45 %
22 = 60/40 %
SM99421B2E =
@ 75.0 MHz
* Standard
SM994
21
B
2
E
75.0
Call factory for additional options. Use full descriptive part number when ordering. Parts will be marked with series and frequency only.
NOTE :
With “Standby Function” activated, the oscillator stops oscillating (conserving power) and output impedance goes high.
Monitor Products Company Inc reserves the right to make changes to its products and product specifications without notice. No liability is assumed as a result of their use or application.
08-21-01
502 VIA DEL MONTE, OCEANSIDE, CA 92054
TEL:
760.433.4510
FAX:
760.434.0255
综合技术交流
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
